- #1

Odette

- 9

- 0

- Homework Statement
- Hallo. Can somebody explain to me what's the importance-use of unit vector in the below (second) equation? Why isn't the first equation just enough to describe r? What's the reason for unit vector to even exist?

- Relevant Equations
- in the photos

**Homework Statement:**Hallo. Can somebody explain to me what's the importance-use of unit vector in the below (second) equation? Why isn't the first equation just enough to describe r? What's the reason for unit vector to even exist?

**Homework Equations:**in the photos